LEED Silver Rating. Architectural Design Goals: Mechanical Design Goals: Sustainability Technical Narrative

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1 Sustainability Technical Narrative LEED Silver Rating General: The Marine Corps Reserve Vehicle Maintenance Facility shall conform to the USGBC format utilizing LEED Version 2.2 for New Construction (NC) to achieve a Silver rating for the complex. The attached LEED project check-list indicates the team approach and a current assessment for the credits in order to achieve a Silver rating. The checklist outlines a comprehensive planning report defining each LEED sustainable credit and which credits shall be included in the proposed design. In addition to using the USGBC LEED rating system as a guide for attaining LEED credits, the project Team plans to incorporate sustainable elements and concepts as key components of the design and construction phases of the project. The overall objective is to develop an environmentally and energy responsible facility that provides long-term value to the Government. A key aspect of achieving the Silver rating on any project is the understanding that the LEED process is a Team effort. Not only will the team work together to achieve the certification, but a dialog must occur with the end user to involve them in the decision making process. The LEED Silver rating for the Marine Corps Reserve Vehicle Maintenance Facility shall be contingent upon a comprehensive approach. The inclusion of all personnel involved with the design and construction of the Facility will be imperative to ensure the Silver Rating achievement. The viability of certain credits can change throughout the design and construction phases based on the fluctuation of market values; therefore the Team will continuously reevaluate the designated potential credits throughout the project. Architectural Design Goals: In the design phase, the intent is to create an environmentally friendly and energy efficient environment for the personnel at the Naval Weapons Station. This concept will be incorporated by utilizing materials that have a high recycled content, contribute to the low-maintenance and durability needs of the facility, and to create a desirable indoor air quality environment through the use of low emitting materials. Many specified materials have recycled content such as the standing seam metal roof, the structural steel, the metal framing systems, the metal decking, and the structural concrete. High performance glazing systems will also be utilized to contribute to energy savings and day lighting needs. An extensive effort will be made to meet the credit compliance for Daylight and Views by utilizing the programmed windows in the Administrative area and by utilizing the overhead bay doors as an opportunity for open views to the exterior. Contributions to points can be achieved by utilizing innovative approaches, such as specifying biobased products. Some examples of bio-based products are spray foam insulation, composition tile, and roofing sealant. With upfront coordination between the Government, Contractor, Architect, and Engineers the LEED Design and Construction process including submittals to USGBC will be an achievable process and meet the desired goals of the project team. Mechanical Design Goals: Sustainable Design Features will be achieved by the following sustainable design goals. The project shall be designed and operated to meet and achieve and Energy Star label. Per the Engineering & Construction Bulletin , the project will be designed and constructed to achieve a Sustainability Goal of certification per the USGBC rating system LEED 2.2 NC Silver as a minimum.

2 o As a pre-registered LEED 2.2 NC Project the mandatory LEED NC credits for mechanical HVAC and plumbing are the Energy & Atmosphere (EA) Prerequisite (P) 2 Minimum efficiency of 14% better than ASHRAE Std for new construction or two credits, Energy & Atmosphere (EA) Prerequisite (P) 3 Fundamental Refrigerant Management Energy & Atmosphere (EA) Credit (Cr) 1 Optimized Energy Performance following the Performance Rated methodology using ASHRAE Std , Appendix G. Energy & Atmosphere (EA) Cr 4 Enhanced Refrigerant Management Energy & Atmosphere (EA) Cr 5 Measurement and Verification. Using the Energy Star Benchmarking Tool and then entering the lessons learned into the High Performance Buildings Database Environmental Quality (EQ) credit 7.1 Thermal Comfort Designing the spaces to comply with ASHRAE Standard for Thermal Comfort and ASHRAE Std for Acceptable Indoor Air Quality. Through moisture control strategies to prevent condensation on cold HVAC surfaces and maintaining space conditions within 40%-60% RH By using sealants and other materials that are low content of volatile organic materials (VOCs) Only using Energy Star or FEMP Best Available Efficiency products. Water Efficiency (WE) credit 1.1 for Water reduction for irrigation by 50% by use of Water efficient landscaping. Water Efficiency (WE) credit 3.1 reducing overall water use by 20% by use of low flow fixtures with sensor controls Commissioning & Commissioning Agent or Commissioning Authority (CxA) o The contractor will provide enhanced project commissioning as defined by both the fundamental commissioning prerequisite for Energy and Atmosphere category as well the enhanced commissioning stipulations for EA Cr 3. o As such the commissioning agent must be independent from the project design and construction team, participating in design review, o The CxA will assist by facilitating the completion of the owner project requirements (OPR) document and the basis of design document (BoD) revision to the templates provided in the RFP and from the government. o The CxA will be during the first year of operation assist with the gathering and processing data related to securing the Energy Star label. The Project will comply with Executive Order Energy Efficiency objective: EPACT % more efficient than ASHRAE Std Productive and Healthy Indoor Environment ASHRAE Std 55 Occupant comfort per ASHRAE Std. 129 Building Energy Monitoring and Verification for Energy Star Compliance and LEED 2.2 NC Energy and Atmosphere Credit 7.1 by facility / building direct digital controls and monitored meters for electric, water and other fuel. Building Indoor Environmental quality by monitoring CO2 and the ventilation air flow Energy Star Label Ventilation and Building Pressurization: The building shall be ventilated in the heated and cooled spaces per the ASHRAE The building shall be maintained at slightly positive pressure relative to ambient conditions. Energy Efficiency: The Energy Efficiency basis of design shall be the ASHRAE Std Energy Efficiency is achieved through the energy efficient building envelope and HVAC and high efficiency lighting and controls of lighting systems by exceeding ASHRAE Std with the directed goal of exceeding the minimum

3 standards by 30% of the ASHRE Std requirements by 30% per Energy Policy and Conservation Act of 2005 (aka EPACT2005) and Executive Order If that level is not achievable then the most cost effective option, with the least life cycle cost shall be designed.. The envelope consists of walls finished with brick veneer on cmu, standing seam metal panel roof system with *R-30 insulation at ceiling and insulated-tinted glass window units and storefront system. A combination of central air handling units, and dedicated units for certain spaces will be used to limit fan energy to minimum required. Electrical rooms, and communication rooms shall have dedicated units to serve the spaces. The office and administration spaces shall be served by variable volume central systems. The VAV system shall provide temperature control for the spaces as well as limit fan energy to minimum required. System shall modulate to 30% to maintain required ventilation before heat is provided to spaces. Supply duct work will be wrapped with 2 insulation R-4.5. All duct work shall be leak tested in accordance with the SMACNA HVAC Air Duct Leakage Test Manual and sealed with low volatile organic compound (VOC) content mastics embedded glass fabric. An air-to-air split system heat pump DX units that serve the Communications / Data Server space, Communications spaces will have an EER of no less than 12.0 and a COP of 3.5 Exhaust fans shall be inline type with no rotating equipment requiring maintenance to be located on the roof of the building except for the exhaust from drum storage which shall be roof mounted and operate continuously. Productive and Healthy Indoor Environment: Ventilation is in accordance with ASHRAE , Ventilation for Acceptable Indoor Air Quality. The concentration of CO in the air will continuously be monitored in the Vehicle Maintenance and Service Bays. The concentration of CO2 shall be monitored in the return air of the offices and Tools and Publication Room and shall be used to regulate the required dilution air or demand control ventilation air for those spaces the amount of ventilation provided to the space with maintenance of space pressure being the minimum when unoccupied.. During normally occupied, low occupancy periods, the ventilation system shall decrease the amount of outside air to the space to minimum required to handle exhaust from the toilets through use of either SCR or variable speed drives or damper dampers. The building is pressurized target at 0.05 cfm/sqft. The toilet shall be exhausted at 50 cfm per water closet or urinal or 2 cfm per SF. Air distribution devices and exhaust fans shall be selected to minimize system noise with the object of maintaining not less than NC 35 in the office spaces and NC 45 in the service (from HVAC equipment only) spaces, battery storage. Air filtration per ASHRAE Std. 52. MERV 8 return filters will protect air distribution systems in construction and MERV 13 filters shall provide filtration of air borne particles in the air handling units after acceptance. Ventilation Effectiveness per ASHRAE 129. HVAC comfort per ASHRAE Std. 55. Ventilation Bays shall be provided in the bays with exterior operable louvers or fixed louver with operable dampers with travel end switches interlocked with the exhaust fans and electric heat. Louvers must be open prior to fans operating and closed prior to operation of electric heat. High CO or CO2 levels in the maintenance bay shall cause the control system to operate the engine exhaust fan upon high CO alarm.

4 The facility shall be provided with an air compressor, refrigerated air drier and Galvanized black steel or copper compressed air distribution piping separated from non copper with dielectric / bronze fittings drops at each of 4 end and on sides of the VMF bays shall be terminated with shut off ball valves, filters/moisture separator, pressure gauge, regulator, and quick connect fittings and drip legs. The vehicle lubrication, grease fluid dispensing system shall be provided complete with air operated pumps, and piping centrally located with dispensing accessories, measurement capability and control, grease dispensing shall be trigger controlled, including swivel couplings and distribution rated for 6000 psi. Each bay shall have auto-retracting hose reels with sufficient hose to serve the entire air of each respective bay. Also included in the system are motor oil 2 gpm) (30 2 gpm), water (2 gpm), antifreeze (2 gpm), compressed air (15 scfm), gear oil (80-90 wt at 2 gpm). Provided in the drum area will be a packaged spill containment capable of holding 80 gallons. Resource Conservation and Environmental Responsibility: Water closets shall be 1.28 gpf. Urinals shall be waterless. Single control pressure balance mixing valves with integral stops will limit showerhead flows to 1.5 gpm. Energy systems monitoring and controls interoperability: The base currently does not have building automation supplier on the site currently is a Rockwell IGDDCS system using PLC controllers and devices. The interface to that system must be of that similar type. is shall provide a direct digital control system interface to the base control system for the remote operational control, monitoring, metering and scheduling of the facility HVAC and energy consumption Space Criteria compliance will be provided to record the energy and resource use, monitor CO2 levels for the HVAC ventilation control. The SBT system will provide control and monitoring of the space CO2, humidity, and temperature. The control system will be used to monitor CO2 and do demand ventilation control ventilation air to meet the demand for fresh air of the most demanding space. The system will monitor the Utility and energy consumption of the facility via interface to the electric meter, gas meter, and water meter. The approved site energy systems supplier. SBT, will be incorporate Lon ANSI standard or BacNet interoperable, open protocol, web-enabled system. LEED EA Prerequisite Commissioning: The building HVAC, water heating, electrical, lighting, commissioning will include training on the operation, recommended scheduled maintenance, monitoring and control of these systems in compliance with both the USGBC LEED v2.2 for certification of the building sustainable design. Electrical Sustainable Design Goals The main goal for sustainability of the building is to minimize the overall energy consumption of the building electrical load via smart power systems and lighting design. This will be achieved by conforming to the ASHRAE Std mandatory provisions for power and lighting, and applying LEED energy design concepts.

5 Reducing the voltage drop in the distribution system will reduce power loss and provide for a more efficient system, thus prolonging the useful life of all electrical equipment. This results in a reduction in overall maintenance costs for the building. The project will conform to the standards set in the 2008 National Electrical Code (NEC), which allows for 2% voltage drop in feeder conductors, and 3% voltage drop for branch circuit conductors. This shall be accomplished by providing the adequate size of conductors with respect to the load being served, and minimizing the length of run for each circuit. The overall lighting load can be reduced by choosing efficient light fixtures that provide adequate lighting for the least amount of watts. In general, interior lighting fixtures will utilize fluorescent type light sources as required to suit the usage of the space. Fluorescent fixtures shall utilize solid state electronic ballasts and energy efficient, low mercury type (Phillips ALTO or equivalent), T8 lamps. Electronic ballasts will be specified to limit total harmonic distortion (THD) to less than 20 percent. Fluorescent lamps shall have a minimum color rendering index (CRI) of 85 and a color temperature of 4100 degrees Kelvin. Where parabolic louvers are specified, they shall be low iridescent type. Where prismatic lenses are specified, they shall be inches nominal thickness. Interior lighting power densities for specific areas shall conform to the ASHRAE space-by-space allowances and LEED design credit requirements. The list below shows the minimum performance to be achieved for each type of area within the facility: Interior Space Type Watts/ft 2 Individual Offices 1.1 Storage Rooms 0.8 Mechanical/Electrical/Comm. Rooms 1.5 Men s/women s Head/Lockers 0.9 The LEED requirements states that the lighting power density requirements shall be reduced to 70% of what ASHRAE requires, for LEED sustainable/certified buildings. This reduction in the lighting power density shall be followed in the lighting design for the facility. All exterior light fixtures shall utilize metal halide lamps, and shall be full-cutoff. Perimeter lighting shall have house-side-shields to minimize light trespass. Exterior lighting power densities for specific areas shall conform to the ASHRAE allowances and LEED design credit requirements. The list below shows the minimum performance to be achieved for each type of area surrounding the exterior of the facility: Exterior Space Type Watts/ft 2 Parking lot 0.15 Walkways 0.20 Building entrances/exits 30 (Watts/linear foot)

6 LEED for New Construction (NC) V2.2 Check List

7 LEED-NC Version 2.2 Registered Project Checklist Marine Corps Reserve Vehicle Maintenance Facility Naval Weapons Station, Charleston, SC Credit Guardian Sustainable Sites 14 Points Y Cont. Prereq 1 Construction Activity Pollution Prevention Required 1 Credit 1 Site Selection 1 1 Credit 2 Development Density & Community Connectivity 1 1 Credit 3 Brownfield Redevelopment 1 1 Credit 4.1 Alternative Transportation, Public Transportation Access 1 1 Arch. Credit 4.2 Alternative Transportation, Bicycle Storage & Changing Rooms 1 1 Civil Credit 4.3 Alternative Transportation, Low-Emitting and Fuel-Efficient Vehicles 1 1 Civilil Credit 4.44 Alternative ti Transportation, ti Parking Capacity 1 1 Credit 5.1 Site Development, Protect of Restore Habitat 1 1 Civil Credit 5.2 Site Development, Maximize Open Space 1 1 Civil Credit 6.1 Stormwater Design, Quantity Control 1 1 Civil Credit 6.2 Stormwater Design, Quality Control 1 1 Civil Credit 7.1 Heat Island Effect, Non-Roof 1 1 Arch. Credit 7.2 Heat Island Effect, Roof 1 1 MEP Credit 8 Light Pollution Reduction Water Efficiency 5 Points 1 Civil Credit 1.1 Water Efficient Landscaping, Reduce by 50% 1 1 Civil Credit 1.2 Water Efficient Landscaping, No Potable Use or No Irrigation 1 1 MEP Credit 2 Innovative Wastewater Technologies 1 1 MEP Credit 3.1 Water Use Reduction, 20% Reduction 1 1 MEP Credit 3.2 Water Use Reduction, 30% Reduction Energy & Atmosphere 17 Points Y MEP Prereq 1 Fundamental Commissioning of the Building Energy Systems Required Y MEP Prereq 2 Minimum Energy Performance Required Y MEP Prereq 3 Fundamental Refrigerant Management Required 6 4 MEP Credit 1 Optimize Energy Performance 1 to % New Buildings or 3.5% Existing Building Renovations % New Buildings or 7% Existing Building Renovations % New Buildings or 10.5% Existing Building Renovations % New Buildings or 14% Existing Building Renovations % New Buildings or 17.5% Existing Building Renovations % New Buildings or 21% Existing Building Renovations % New Buildings or 24.5% Existing Building Renovations 7 35% New Buildings or 28% Existing Building Renovations % New Buildings or 31.5% Existing Building Renovations 9 42% New Buildings or 35% Existing Building Renovations 10 3 Credit 2 On-Site Renewable Energy 1 to 3 1 MEP Credit 3 Enhanced Commissioning i i 1 1 MEP Credit 4 Enhanced Refrigerant Management 1 1 Credit 5 Measurement & Verification 1 1 Credit 6 Green Power 1 continued Materials & Resources 13 Points Y Arch. Prereq 1 Storage & Collection of Recyclables Required 1 Credit 1.1 Building Reuse, Maintain 75% of Existing Walls, Floors & Roof 1 1 Credit 1.2 Building Reuse, Maintain 95% of Existing Walls, Floors & Roof 1 1 Credit 1.3 Building Reuse, Maintain 50% of Interior Non-Structural Elements 1 1 Cont. Credit 2.1 Construction Waste Management, Divert 50% from Disposal 1

8 1 Cont. Credit 2.2 Construction Waste Management, Divert 75% from Disposal 1 1 Credit 3.1 Materials Reuse, 5% 1 1 Credit 3.2 Materials Reuse,10% 1 1 C/A Credit 4.1 Recycled Content, 10% (post-consumer + ½ pre-consumer) 1 1 C/A Credit 4.2 Recycled Content, 20% (post-consumer + ½ pre-consumer) 1 1 C/A Credit 5.1 Regional Materials, 10% Extracted, Processed & Manufactured Regio 1 1 C/A Credit 5.2 Regional Materials, 20% Extracted, Processed & Manufactured Regio 1 1 Credit 6 Rapidly Renewable Materials 1 1 Arch. Credit 7 Certified Wood Indoor Environmental Quality 15 Points Y Cont. Prereq 1 Minimum IAQ Performance Required Y Cont. Prereq 2 Environmental Tobacco Smoke (ETS) Control Required 1 MEP Credit 1 Outdoor Air Delivery Monitoring 1 1 Credit 2 Increased Ventilation 1 1 Cont. Credit 3.1 Construction IAQ Management Plan, During Construction 1 1 Credit 3.2 Construction IAQ Management Plan, Before Occupancy 1 1 C/A Credit 4.1 Low-Emitting Materials, Adhesives & Sealants 1 1 C/A Credit 4.2 Low-Emitting Materials, Paints & Coatings 1 1 C/A Credit 4.3 Low-Emitting Materials, Carpet Systems 1 1 C/A Credit 4.4 Low-Emitting Materials, Composite Wood & Agrifiber Products 1 1 C/A Credit 5 Indoor Chemical & Pollutant Source Control 1 1 MEP Credit 6.1 Controllability of Systems, Lighting 1 1 MEP Credit 6.2 Controllability of Systems, Thermal Comfort 1 1 MEP Credit 7.1 Thermal Comfort, Design 1 1 MEP Credit 7.2 Thermal Comfort, Verification 1 1 Arch. Credit 8.1 Daylight & Views, Daylight 75% of Spaces 1 1 Arch. Credit 8.2 Daylight & Views, Views for 90% of Spaces Innovation & Design Process 5 Points 1 MEP Credit 1.1 Innovation in Design: Low Mercury Lamp (LEED EB) 1 1 MEP Credit 1.3 Innovation in Design: Exemplary Performance for 40% Water Efficien 1 1 Gov/Arch Credit dit Innovation in Design: Bio-Based Products 1 1 MEP Innovation in Design: Moisture Control Plan 1 1 Arch Credit 2 LEED Accredited Professional Project Totals (pre-certification estimates) 69 Points Certified points Silver points Gold points Platinum points